Preheat oven to 250°F.,Pop popcorn according to package instructions. Spread out on a greased sheet pan and remove all of the unpopped seeds.,______,Pour butter mixture over popcorn and stir to coat. Bake in the oven for 1 hour, stirring every 15 minutes.,Add sprinkles as the popcorn comes out the last time. Stir to combine.,Let cool for 1 hour before serving.